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Reusable rocket technology has been a 'holy grail' of sorts for space exploration. Building reusable components is supposed to make space travel more affordable, but the Space Shuttle is the prime example of how that's not necessarily true, as it cost over an order of magnitude more than originally planned. Still, it should be possible to make reusable rockets that are cheaper to operate, and some private companies are figuring out how to do it. SpaceX hasn't quite gotten reusable rockets perfected yet (though, it has done it more than a few times with its Grasshopper vehicle). And depending on how you define a "rocket" -- Virgin Galactic & Scaled Composites have also developed reusable space vehicles.

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The number of ways to get a person into space is pretty limited at the moment. Only Russia and China have operational launch systems that can escape the Earth's gravity (with people as passengers). There are a bunch more spaceships in development, though, so if you really want to get into space without a Soyuz or Shenzhou, you'll have to be patient. There have been a few recent accidents, but it looks like engineers have figured out some of the problems.

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Getting stuff into space is difficult. There are a bunch of different rockets that have been used over the last few decades, but the odds of a launch failure isn't quite zero yet. A few companies are making cheaper launch systems, but a perfect track record is hard to maintain over more than a handful of launches. Perhaps that's why sentient robots in the movies never think about leaving the Earth behind.

Three failed resupply missions to the International Space Station (ISS) have occurred over the last 8 months. Orbital Sciences is shifting away from using 1960s-era Soviet rocket engines that were probably the cause of its launch failure last October. In May, a Russian re-supply mission put its cargo in the wrong orbit. And SpaceX's investigations are ongoing for its recent Falcon 9 explosion. There are actually a few other options for getting supplies to the ISS, and Orbital Sciences will be employing alternative launch systems to fulfill its contract while it works on its replacement engines. [url]